16 cm dermoid should be removed by open surgery. During removing a dermoid cyst the contents of the cyst should not be spilled in the abdominal cavity.
If such a big cyst is laparoscopically removed there are chances of spillage.
Therefore it's better to go for open surgery.

Self medication of abortion pills can be dangerous, they should always be taken under a doctor's supervision.
Before taking them ultrasound should be done to confirm the duration and location of pregnancy.
Blood group and haemoglobin level should also be known.

Continue taking medicines as advised by your doctor
As it's your first pregnancy chances of complications due to different blood group will be negligible.
You should get your Indirect coombs test done.
To avoid comications in further pregnancies your doctor will give you antiD vaccine at 28 weeks of pregnancy, 2nd shot of vaccine will be given within 72 hrs of delivery if babies blood group is the+ve.

According to ultrasound report she is having intrauterine growth retardation.
She should take adequate rest.
Take a protein rich diet.
Take beet root juice.
Regular walking for 20 minutes daily.
Rest follow your doctor's advice and take regular medication as advised by your doctor.

She should do her urine pregnancy test, if test is positive it means abortion is incomplete, and she should get an ultrasound done.
Further treatment will depend on ultrasound report.
If urine pregnancy test is negative then she will have to take Medicines to stop bleeding.

Premenstrual syndrome or PMS is a common phenomenon that happens to over 75% of menstruating women. It refers to a set of symptoms that a woman experiences 7 to 10 days within the onset of her monthly period. The symptoms often cause great discomfort to the woman, but disappear soon after the period gets over.

The symptoms include muscle cramps, headache, body ache, nausea, dizziness, fatigue, mood swings and a lot more. This is not a pathogen related disease. It is caused due to hormonal imbalance before the start of menses in women. The level of female hormones i.e. estrogen and progesterone fluctuate inside a woman’s body prior to the menses. They are believed to have an impact on certain chemicals released by the brain. Therefore, women experience these symptoms during this time of their monthly cycle.

You don’t need to depend on strict medication to get rid of these symptoms. They can vanish if you make some changes in your lifestyle. Here are some natural ways to get rid of these symptoms:

Check your diet: In order to enjoy a healthy period, you need to avoid certain food items. Trans fats and hydrogenated fats can increase these symptoms. Cut down on the sugar content of your meal as high sugar level can give birth to some of these symptoms like mood swings, headache, nausea, etc. It is also important to check the water content in your body. It is advisable to avoid salt as too much water retention can be bad. Too much consumption of caffeine can cause depression and anxiety.

Go for a holistic and balanced diet: Women must include sufficient amounts of minerals and vitamins in their diet to avoid PMS. Try eating foods that are rich in magnesium such as bananas and leafy green vegetables. Also consume Vitamin A rich foods, mainly yellow and orange vegetables.

Take up some light exercises: Light aerobic exercises may help you in getting some relief from bloated stomach and pain. But, don’t exert yourself in doing stressful exercises.

Try some heat: Applying a heat pad can provide relief from muscle cramps and abdominal pain. Heat dilates the blood vessels and improves flow of blood through them. This provides relief from any sort of pain.

Drink right: It is true that too much retention of water in the body can worsen PMS. But it is advisable that you drink sufficient amount of water during the periods or before it starts. As experts say, water itself can hinder water retention in your body. Besides water, go for herbal drinks like a cup of hot gingertea. Some herbal drinks can work wonders in preventing PMS.

Norethisterone and ethinyl oestradiol combination pills are contraceptive pills, but they are also used in patients who have irregular periods or have excessive bleeding.
It's use regularizes periods and in patients who have excessive bleeding it's use controls bleeding.